<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>

    <style>
      * {
        padding: 0;
        margin: 0;
      }
      body {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        background-color: #000;
      }
      ul {
        position: relative;
        display: flex;
        height: 200px;
      }
      ul::after {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        color: darkturquoise;
        font-size: 30px;
        font-weight: 700;
        transform: translate(-50%, -700%);
      }
      li {
        width: 20px;
        height: 20px;
        border-radius: 10px;
        margin: 0 10px;
      }
      li:nth-child(1) {
        background-color: magenta;
        animation: love1 5s 0s infinite;
      }
      li:nth-child(2) {
        background-color: snow;
        animation: love2 5s 0.2s infinite;
      }
      li:nth-child(3) {
        background-color: darkorange;
        animation: love3 5s 0.4s infinite;
      }
      li:nth-child(4) {
        background-color: skyblue;
        animation: love4 5s 0.6s infinite;
      }
      li:nth-child(5) {
        background-color: darkcyan;
        animation: love5 5s 0.8s infinite;
      }
      li:nth-child(6) {
        background-color: red;
        animation: love4 5s 1s infinite;
      }

      li:nth-child(7) {
        background-color: blue;
        animation: love3 5s 1.2s infinite;
      }

      li:nth-child(8) {
        background-color: skyblue;
        animation: love2 5s 1.4s infinite;
      }

      li:nth-child(9) {
        background-color: green;
        animation: love1 5s 1.6s infinite;
      }
      /* 下面定义动画 */
      @keyframes love1 {
        30%,
        50% {
          height: 60px;
          transform: translateY(-30px);
        }
        70%,
        100% {
          height: 20px;
          transform: translateY(0);
        }
      }

      @keyframes love2 {
        30%,
        50% {
          height: 125px;
          transform: translateY(-60px);
        }

        70%,
        100% {
          height: 20px;
          transform: translateY(0);
        }
      }

      @keyframes love3 {
        30%,
        50% {
          height: 160px;
          transform: translateY(-75px);
        }

        70%,
        100% {
          height: 20px;
          transform: translateY(0);
        }
      }

      @keyframes love4 {
        30%,
        50% {
          height: 180px;
          transform: translateY(-60px);
        }

        70%,
        100% {
          height: 20px;
          transform: translateY(0);
        }
      }

      @keyframes love5 {
        30%,
        50% {
          height: 200px;
          transform: translateY(-45px);
        }

        70%,
        100% {
          height: 20px;
          transform: translateY(0);
        }
      }
      p {
        margin-top: 300px;
        margin-right: 100px;
        text-align: center;
        font-size: 20px;
        font-weight: 600;
        background: linear-gradient(to right, red, green);
        -webkit-background-clip: text;
       
      }
    </style>
  </head>
  <body>
    <ul>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
    </ul>
    <p>儿童节快乐呀</p>
  </body>
</html>
